A252166 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7

37337, 12842, 46233, 170398, 874123, 3444924, 13087197, 69021164, 272148070, 1031454085, 5527138496, 21748536917, 82643571143, 445618059415, 1752375389583, 6660147448909, 36122877302714, 141719500839611

Offset

1,1

Comments

Column 7 of A252167

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..2..3..2..2..3..2..2..3..2....0..3..1..3..3..1..0..3..1
..3..1..3..3..1..3..3..1..3....2..2..3..2..2..3..2..2..0
..2..0..2..2..3..2..2..0..2....2..2..3..2..2..3..2..2..3
..2..3..2..2..3..2..2..3..2....3..0..1..3..3..1..3..3..1
..3..1..0..3..1..3..3..1..0....2..2..3..2..2..3..2..2..3
..2..3..2..2..0..2..2..0..2....2..2..0..2..2..3..2..2..0

Crossrefs

Sequence in context: A219363 A254564 A151630 * A151840 A250369 A215993

Adjacent sequences: A252163 A252164 A252165 * A252167 A252168 A252169

Keyword

nonn

Author

R. H. Hardin, Dec 14 2014

Status

approved